I'm currently out of a gf at the moment, but I've never cheated in the past. It just seems unfair to the other member of the relationship if you lie to them saying that you love them while you are simultaneously backstabbing her. Either you love someone or you don't. If you do, be faithful. If you don't, cheat your heart out, but for the love of everything important in your life, tell your gf that you don't love her. I'm almost sure that a girl would much rather have a guy be honest and say that he doesn't love her (and should just be friends is a nice clause to keep things nonviolent, depending on how deep the relationship got), rather than have her find out that you're cheating on her (probably for sex, which is not only a blow to her trust in you, it's an insult to her because you are saying she isn't pleasing you enough). If a girl isn't pleasing you enough, then maybe you should come off your high horse and realize it's not all about you. Unless she's abusive or something (which is a completely different topic). But yea, don't cheat.